Portable Generator User Manual

Troubleshooting & Repair Section.................................................................................Section F
Safety Precautions.................................................................................................................F-1
How to Use Troubleshooting Guide......................................................................................F-1
Troubleshooting Guide...................................................................................................F1 - F-9
Test Procedures
Rotor Voltage Test ........................................................................................................F-10
Rotor Resistance Test...................................................................................................F-12
Engine Throttle Adjustment Test...................................................................................F-15
Oscilloscope Waveforms
Normal Open Circuit Weld Voltage Waveform .............................................................F-18
Normal Open Circuit Weld Voltage Waveform (115 VAC Supply)................................F-19
Typical Weld Output Waveform - Machine Loaded .....................................................F-20
Replacement Procedures
Brush Removal and Replacement ................................................................................F-21
Rheostat Removal and Replacement ..........................................................................F-23
Capacitor and Diode Bridge Removal and Replacement.............................................F-25
Stator/Rotor Removal and Replacement (Kit S20925).................................................F-27
Retest After Repair ..............................................................................................................F-32
TABLE OF CONTENTS
TROUBLE SHOOTING & REPAIR SECTION
POWER-ARC 4000
Section F
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